Is it enough light?

[fishboii]

My screen is 10Wx12L
On a 125g tank with 23w CFL on each side.
Is this enough lighting?

[dtyharry]

No. 120sq in requires a target wattage of 120w total split over both sides.

[fishboii]

Could this be the reason why im getting dark algae?

[SantaMonica]

Yes. Try stronger lights, and eventually if it starts growing yellow, just reduce the hours, not the wattage.

[fishboii]

Im really short on space under the tank to be putting more lamps =(
Could i just use the 48w cfl?

[SantaMonica]

Yes but try it for 8 hours.

[fishboii]

Although im getting dark algae, it still reduces nitrate and phosphate correct?
Thanks alot for answering my questions!

[SantaMonica]

Yes but light green algae removes more, until it turns yellow.